$B: Boolean Evaluation Switch


3.2.3. $AMD: AMD 3DNow! Assembler Instructions Switch	Table of Contents	3.2.5. $C: Assert Directives Switch

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3. Compiler Directives

3.2. Switch and Parameter Directives

3.2.4. $B: Boolean Evaluation Switch

Targets: MS-DOS, OS/2, Win32

Compiler directives

Switches on/off the two different models of code generation for the AND and OR Boolean operators.

Syntax:

  {$B+} or {$B-}

Default:

  {$B-}

Remarks:
If {$B+} defined, the compiler generates code for complete boolean expression evaluation. I.e. every operand of a boolean expression built from the AND and OR operators is guaranteed to be evaluated, even when the result of the entire expression is already known.

If {$B-} defined, the compiler generates code for short-circuit boolean-expression evaluation. I.e. evaluation stops as soon as the result of the entire expression becomes evident.


3.2.3. $AMD: AMD 3DNow! Assembler Instructions Switch	Table of Contents	3.2.5. $C: Assert Directives Switch

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